Approximation of nonlinear properties of soft-magnetic materials with Bézier curves

Adequate mathematical description of magnetization curves is indispensable in engineering. The accuracy of the description has significant impact on design of electric machines and devices. The aim of this paper was to systematically analyze the capability of Bézier curves to describe the nonlinear properties of soft-magnetic materials. Bézier curves were compared with most used sigmoid functions. The conclusion was that Bézier curves have the flexibility needed to describe discussed nonlinear properties, whereas an in-depth analysis and comparison versus state-of-the-art functions for description of nonlinear magnetization curves will be presented in the full-paper.